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A conversational agent is an agent that interacts with users using natural language interface. Especially in Internet space, its role has been recently highlighted as a virtual representative of a web site. However, most conversational agents use simple pattern matching techniques for their answer without considering user goals and thus give user an(More)
— In this paper, we advocate addressing the communication overhead problem between OpenFlow controllers and OpenFlow switches due to table-miss in a flow table. It may cause the communication overhead between controllers and switches because a switch has to send packet-in message to a controller for processing table-missed flows. We propose a simple flow(More)
In this paper, we evolve artificial neural networks (ANNs) with speciation and combine them with several methods. In general, an evolving system produces one optimal solution for a given problem. However, we argue that many other solutions exist in the final population, which can improve the overall performance. We propose a new method of evolving multiple(More)
Recently, there has been extensive work on the construction of fuzzy controllers for mobile robots by a genetic algorithm (GA); therefore, we can realize evolutionary optimization as a promising method for developing fuzzy controllers. However, much investigation on the evolutionary fuzzy controller remains because most of the previous works have not(More)
For a service robot to be more human friendly, it is required to have various emotional interactions with human. Inspired from both neuroscience and cognitive science, this paper proposes a dynamic robot affective system that can have various emotional states at the same time and express those combined emotions just like humans do. The system comprises(More)